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node_modules/postcss-minify-selectors/dist/index.js

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+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+    value: true
+});
+
+var _postcss = require("postcss");
+
+var _alphanumSort = require("alphanum-sort");
+
+var _alphanumSort2 = _interopRequireDefault(_alphanumSort);
+
+var _has = require("has");
+
+var _has2 = _interopRequireDefault(_has);
+
+var _postcssSelectorParser = require("postcss-selector-parser");
+
+var _postcssSelectorParser2 = _interopRequireDefault(_postcssSelectorParser);
+
+var _unquote = require("./lib/unquote");
+
+var _unquote2 = _interopRequireDefault(_unquote);
+
+var _canUnquote = require("./lib/canUnquote");
+
+var _canUnquote2 = _interopRequireDefault(_canUnquote);
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
+
+const pseudoElements = ["::before", "::after", "::first-letter", "::first-line"];
+
+function getParsed(selectors, callback) {
+    return (0, _postcssSelectorParser2.default)(callback).processSync(selectors);
+}
+
+function attribute(selector) {
+    if (selector.value) {
+        // Join selectors that are split over new lines
+        selector.value = selector.value.replace(/\\\n/g, "").trim();
+
+        if ((0, _canUnquote2.default)(selector.value)) {
+            selector.value = (0, _unquote2.default)(selector.value);
+        }
+
+        selector.operator = selector.operator.trim();
+    }
+
+    if (!selector.raws) {
+        selector.raws = {};
+    }
+
+    if (!selector.raws.spaces) {
+        selector.raws.spaces = {};
+    }
+
+    selector.raws.spaces.attribute = {
+        before: "",
+        after: ""
+    };
+
+    selector.raws.spaces.operator = {
+        before: "",
+        after: ""
+    };
+
+    selector.raws.spaces.value = {
+        before: "",
+        after: selector.insensitive ? " " : ""
+    };
+
+    if (selector.insensitive) {
+        selector.raws.spaces.insensitive = {
+            before: "",
+            after: ""
+        };
+    }
+
+    selector.attribute = selector.attribute.trim();
+}
+
+function combinator(selector) {
+    const value = selector.value.trim();
+
+    selector.value = value.length ? value : " ";
+}
+
+const pseudoReplacements = {
+    ":nth-child": ":first-child",
+    ":nth-of-type": ":first-of-type",
+    ":nth-last-child": ":last-child",
+    ":nth-last-of-type": ":last-of-type"
+};
+
+function pseudo(selector) {
+    const value = selector.value.toLowerCase();
+
+    if (selector.nodes.length === 1 && pseudoReplacements[value]) {
+        const first = selector.at(0);
+        const one = first.at(0);
+
+        if (first.length === 1) {
+            if (one.value === "1") {
+                selector.replaceWith(_postcssSelectorParser2.default.pseudo({
+                    value: pseudoReplacements[value]
+                }));
+            }
+
+            if (one.value.toLowerCase() === "even") {
+                one.value = "2n";
+            }
+        }
+
+        if (first.length === 3) {
+            const two = first.at(1);
+            const three = first.at(2);
+
+            if (one.value.toLowerCase() === "2n" && two.value === "+" && three.value === "1") {
+                one.value = "odd";
+
+                two.remove();
+                three.remove();
+            }
+        }
+
+        return;
+    }
+
+    const uniques = [];
+
+    selector.walk(child => {
+        if (child.type === "selector") {
+            const childStr = String(child);
+
+            if (!~uniques.indexOf(childStr)) {
+                uniques.push(childStr);
+            } else {
+                child.remove();
+            }
+        }
+    });
+
+    if (~pseudoElements.indexOf(value)) {
+        selector.value = selector.value.slice(1);
+    }
+}
+
+const tagReplacements = {
+    from: "0%",
+    "100%": "to"
+};
+
+function tag(selector) {
+    const value = selector.value.toLowerCase();
+
+    if ((0, _has2.default)(tagReplacements, value)) {
+        selector.value = tagReplacements[value];
+    }
+}
+
+function universal(selector) {
+    const next = selector.next();
+
+    if (next && next.type !== "combinator") {
+        selector.remove();
+    }
+}
+
+const reducers = {
+    attribute,
+    combinator,
+    pseudo,
+    tag,
+    universal
+};
+
+exports.default = (0, _postcss.plugin)("postcss-minify-selectors", () => {
+    return css => {
+        const cache = {};
+
+        css.walkRules(rule => {
+            const selector = rule.raws.selector && rule.raws.selector.value === rule.selector ? rule.raws.selector.raw : rule.selector;
+
+            // If the selector ends with a ':' it is likely a part of a custom mixin,
+            // so just pass through.
+            if (selector[selector.length - 1] === ":") {
+                return;
+            }
+
+            if (cache[selector]) {
+                rule.selector = cache[selector];
+
+                return;
+            }
+
+            const optimizedSelector = getParsed(selector, selectors => {
+                selectors.nodes = (0, _alphanumSort2.default)(selectors.nodes, { insensitive: true });
+
+                const uniqueSelectors = [];
+
+                selectors.walk(sel => {
+                    const { type } = sel;
+
+                    // Trim whitespace around the value
+                    sel.spaces.before = sel.spaces.after = "";
+
+                    if ((0, _has2.default)(reducers, type)) {
+                        reducers[type](sel);
+
+                        return;
+                    }
+
+                    const toString = String(sel);
+
+                    if (type === "selector" && sel.parent.type !== "pseudo") {
+                        if (!~uniqueSelectors.indexOf(toString)) {
+                            uniqueSelectors.push(toString);
+                        } else {
+                            sel.remove();
+                        }
+                    }
+                });
+            });
+
+            rule.selector = optimizedSelector;
+            cache[selector] = optimizedSelector;
+        });
+    };
+});
+module.exports = exports["default"];